 Date.prototype.format=function(fmt) {        
	     var o = {        
	     "M+" : this.getMonth()+1, //月份        
	     "d+" : this.getDate(), //日        
	     "h+" : this.getHours()%12 == 0 ? 12 : this.getHours()%12, //小时        
	     "H+" : this.getHours(), //小时        
	     "m+" : this.getMinutes(), //分        
	     "s+" : this.getSeconds(), //秒        
	     "q+" : Math.floor((this.getMonth()+3)/3), //季度        
	     "S" : this.getMilliseconds() //毫秒        
	     };        
	     var week = {        
	     "0" : "\u65e5",        
	     "1" : "\u4e00",        
	     "2" : "\u4e8c",        
	     "3" : "\u4e09",        
	     "4" : "\u56db",        
	     "5" : "\u4e94",        
	     "6" : "\u516d"       
	     };        
	     if(/(y+)/.test(fmt)){        
	         fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));        
	     }        
	     if(/(E+)/.test(fmt)){        
	         fmt=fmt.replace(RegExp.$1, ((RegExp.$1.length>1) ? (RegExp.$1.length>2 ? "\u661f\u671f" : "\u5468") : "")+week[this.getDay()+""]);        
	     }        
	     for(var k in o){        
	         if(new RegExp("("+ k +")").test(fmt)){        
	             fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length)));        
	         }        
	     }        
	     return fmt;        
	 } 